Usar Sql en Android

  public Connection conexionDB(){
        Connection conexion=null;
        try{
            StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
            StrictMode.setThreadPolicy(policy);
            Class.forName("net.sourceforge.jtds.jdbc.Driver").newInstance();
            conexion = DriverManager.getConnection("jdbc:jtds:sqlserver://192.168.0.1;databaseName=db;user=sa;password=12345");
        }catch (Exception e){

        }

        return conexion;
    }




    public void login(View v){
        try{

            txtUsuario = (EditText)findViewById(R.id.txtUsuario);
            txtClave = (EditText)findViewById(R.id.txtClave);

            PreparedStatement pst=conexionDB().prepareStatement("Select * From persona Where Usuario = ? And Clave = ?");
            pst.setString(1,txtUsuario.getText().toString());
            pst.setString(2,txtClave.getText().toString());
            ResultSet rs = pst.executeQuery();
            if(rs.next()){
                Toast.makeText(getApplicationContext(), "Acceso Correcto", Toast.LENGTH_SHORT).show();
                Intent Intent = new Intent(this, PrincipalActivity.class);
                startActivity(Intent);
            }else{
                Toast.makeText(getApplicationContext(), "Acceso Incorrecto", Toast.LENGTH_SHORT).show();
            }

        }catch (Exception e){
            Toast.makeText(getApplicationContext(), "Acceso Incorrecto", Toast.LENGTH_SHORT).show();
        }
    }




Link :
https://sourceforge.net/projects/jtds/files/latest/download?source=files
https://www.youtube.com/watch?v=OOm03ezazAI